The World Health Organisation has revealed that at least three people worldwide are infected with totally untreatable “superbug” strains of gonorrhea which they are likely to be spreading to others through sex.

While giving details of studies showing a “very serious situation” with regard to highly drug-resistant forms of the sexually-transmitted disease (STD), WHO experts said it was only a matter of time before last-resort gonorrhoea antibiotics would be of no use.